Magnetic properties of synthesized Fe<sub>x</sub>(Fe<sub>3</sub>O<sub>4</sub>)<sub>1-x </sub>nanoparticles with core-shell structures coated by carbon matrix

POSTER

Abstract

Here we are focused on investigation of magnetic and structural properties of synthesized nanocomposites with iron nanoparticles as effective heat mediators with high thermal energy transfer efficiency suitable for use for magnetic hyperthermia. These nanoparticles have “core-shell” structure, in which the core has a high magnetic moment (such as Fe), and the shell consists of a biocompatible material (e.g. iron oxide or carbide). Complex investigations of structural and magnetic properties of these materials are obtained using X-ray diffraction (XRD), Raman spectroscopy, magnetometry, electron paramagnetic and ferromagnetic resonances (EPR, FMR). The measured magnetization of magnetic saturation and coercivity as well as the specific absorption rate (SAR) show that these materials attractive for magnetic hyperthermia applications. Hysteresis loop of the (Fe-Fe3C)@C nanocomposites is of special interest as it shows almost square behaviour, where Mr/M(200 Oe) = 0.75.

*This work was supported by a grant from the Russian-Armenian (Slavonic) University at the expense of the Ministry of Education and Science of the Russian Federation.The work at CSULA was supported by the National Science Foundation-Partnerships for Research and Education in Materials under Grant DMR-1523588.

Presenters

  • Armen Kocharian

    • Physics Department, California State University, Los Angeles 90032
    • Department of Physics, California State University Los Angeles

Authors

  • Aram Manukyan

    • Laboratory of Solid State Physics, Institute for Physical Research, NAS of Armenia, Ashtarak-2
    • Laboratory of Solid State Physics, Ashtarak-2, Laboratory for Physical Research, NAS of Armenia

  • Harutyun Gyulasaryan

    • Laboratory of Solid State Physics, Ashtarak-2, Laboratory for Physical Research, NAS of Armenia

  • Eduard Sharoyan

    • Laboratory of Solid State Physics, Institute for Physical Research, NAS of Armenia, Ashtarak-2
    • Laboratory of Solid State Physics, Ashtarak-2, Laboratory for Physical Research, NAS of Armenia

  • Jennifer Lynn Gray

    • Materials Characterization Lab, Pennsylvania State University, Materials Research Institute

  • Oscar Bernal

    • Physics Department, California State University, Los Angeles 90032
    • Department of Physics, California State University Los Angeles
    • Physics and Astronomy, California State University, Los Angeles, Los Angeles, CA 90032
    • Physics, California State University, Los Angeles
    • Department of Physics and Astronomy, California State University, Los Angeles, CA 90032, USA.

  • Armen Kocharian

    • Physics Department, California State University, Los Angeles 90032
    • Department of Physics, California State University Los Angeles